Maria Corte-Real Santos
@maria.isogeny.club
Post-doc at ENS de Lyon https://www.mariascrs.com/
Interested in post-quantum cryptography and isogenies
Co-organiser of The Isogeny Club https://isogeny.club/
Interested in post-quantum cryptography and isogenies
Co-organiser of The Isogeny Club https://isogeny.club/
Catch up on last weeks Isogeny Club talk! We welcomed Eli Orvis who taught us about abstract isogeny graphs: www.youtube.com/watch?v=Gzcc...
The Isogeny Club #7.4 Ihara zeta functions of abstract isogeny graphs and modular curves
YouTube video by The Isogeny Club
www.youtube.com
November 13, 2025 at 9:54 AM
Catch up on last weeks Isogeny Club talk! We welcomed Eli Orvis who taught us about abstract isogeny graphs: www.youtube.com/watch?v=Gzcc...
Last week at The Isogeny Club we had a great talk by Sebastian Spindler about modular curves! Check it out here: www.youtube.com/watch?v=EDU7...
Be sure to join us again next Tuesday at the usual time :) isogeny.club
Be sure to join us again next Tuesday at the usual time :) isogeny.club
The Isogeny Club #7.2 Counting l-isogenies with different modular polynomials
YouTube video by The Isogeny Club
www.youtube.com
October 14, 2025 at 10:13 AM
Last week at The Isogeny Club we had a great talk by Sebastian Spindler about modular curves! Check it out here: www.youtube.com/watch?v=EDU7...
Be sure to join us again next Tuesday at the usual time :) isogeny.club
Be sure to join us again next Tuesday at the usual time :) isogeny.club
The Isogeny Club Season 7 starts today! At 5pm CEST, Bruno Sterner will talk about finding large smooth twins from short lattice vectors. More details at isogeny.club
September 23, 2025 at 7:23 AM
The Isogeny Club Season 7 starts today! At 5pm CEST, Bruno Sterner will talk about finding large smooth twins from short lattice vectors. More details at isogeny.club
Reposted by Maria Corte-Real Santos
Announcing The Isogeny Problems!
A curated list of the seven foremost unsolved problems in isogeny-based cryptography. Solving one of these profound questions would mark a monumental advance, and as a resolver you'd get eternal honor and epic rewards!
Full list: isogeni.es/problems
A curated list of the seven foremost unsolved problems in isogeny-based cryptography. Solving one of these profound questions would mark a monumental advance, and as a resolver you'd get eternal honor and epic rewards!
Full list: isogeni.es/problems
The Isogeny Problems
isogeni.es
September 15, 2025 at 7:43 AM
Announcing The Isogeny Problems!
A curated list of the seven foremost unsolved problems in isogeny-based cryptography. Solving one of these profound questions would mark a monumental advance, and as a resolver you'd get eternal honor and epic rewards!
Full list: isogeni.es/problems
A curated list of the seven foremost unsolved problems in isogeny-based cryptography. Solving one of these profound questions would mark a monumental advance, and as a resolver you'd get eternal honor and epic rewards!
Full list: isogeni.es/problems
Reposted by Maria Corte-Real Santos
And you solve the failure rate problem, which was a big source of trouble in the previous implementation. And the new algorithm is simpler to implement!
So very exciting result! (Although I had been spoiled already by @jonathan.isogeny.club talk at Bordeaux in May :))
So very exciting result! (Although I had been spoiled already by @jonathan.isogeny.club talk at Bordeaux in May :))
September 15, 2025 at 7:48 AM
And you solve the failure rate problem, which was a big source of trouble in the previous implementation. And the new algorithm is simpler to implement!
So very exciting result! (Although I had been spoiled already by @jonathan.isogeny.club talk at Bordeaux in May :))
So very exciting result! (Although I had been spoiled already by @jonathan.isogeny.club talk at Bordeaux in May :))
TL;DR: we solve norm equations in a better way and get around a 2x improvement to IdealToIsogeny routines crucial in both SQIsign and PRISM.
Qlapoti: Simple and Efficient Translation of Quaternion Ideals to Isogenies (Giacomo Borin, Maria Corte-Real Santos, Jonathan Komada Eriksen, Riccardo Invernizzi, Marzio Mula, Sina Schaeffler, Frederik Vercauteren) ia.cr/2025/1604
September 12, 2025 at 2:00 PM
TL;DR: we solve norm equations in a better way and get around a 2x improvement to IdealToIsogeny routines crucial in both SQIsign and PRISM.
Reposted by Maria Corte-Real Santos
Evaluation of Modular Polynomials from Supersingular Elliptic Curves (Maria Corte-Real Santos, Jonathan Komada Eriksen, Antonin Leroux, Michael Meyer, Lorenz Panny) ia.cr/2025/1154
June 20, 2025 at 8:55 PM
Evaluation of Modular Polynomials from Supersingular Elliptic Curves (Maria Corte-Real Santos, Jonathan Komada Eriksen, Antonin Leroux, Michael Meyer, Lorenz Panny) ia.cr/2025/1154
Reposted by Maria Corte-Real Santos
Registration for the Leuven Isogeny Days 6 is now open!
📅 10–12 Sept 2025 @ KU Leuven
Morning: research talks
Afternoon: brainstorming sessions
More info: www.esat.kuleuven.be/cosic/projec...
#isogeny #isocrypt #erc #postquantum
📅 10–12 Sept 2025 @ KU Leuven
Morning: research talks
Afternoon: brainstorming sessions
More info: www.esat.kuleuven.be/cosic/projec...
#isogeny #isocrypt #erc #postquantum
June 16, 2025 at 6:17 AM
Registration for the Leuven Isogeny Days 6 is now open!
📅 10–12 Sept 2025 @ KU Leuven
Morning: research talks
Afternoon: brainstorming sessions
More info: www.esat.kuleuven.be/cosic/projec...
#isogeny #isocrypt #erc #postquantum
📅 10–12 Sept 2025 @ KU Leuven
Morning: research talks
Afternoon: brainstorming sessions
More info: www.esat.kuleuven.be/cosic/projec...
#isogeny #isocrypt #erc #postquantum
Reposted by Maria Corte-Real Santos
We (finally) published all the material from this course on SQIsign, including lecture slides and exercise sheets for the Sage laboratory. Available here: github.com/andreavico/S...
June 10, 2025 at 3:58 PM
We (finally) published all the material from this course on SQIsign, including lecture slides and exercise sheets for the Sage laboratory. Available here: github.com/andreavico/S...
Reposted by Maria Corte-Real Santos
Registrations for the Decrypting Diversity Summit are open:
decryptingdiversity.com/registration/
The event's focus is to develop actions to better support underrepresented groups in cryptography while showcasing the exceptional career paths and research contributions of these communities.
decryptingdiversity.com/registration/
The event's focus is to develop actions to better support underrepresented groups in cryptography while showcasing the exceptional career paths and research contributions of these communities.
Decrypting Diversity Summit
Decrypting Diversity Summit
decryptingdiversity.com
May 15, 2025 at 2:34 PM
Registrations for the Decrypting Diversity Summit are open:
decryptingdiversity.com/registration/
The event's focus is to develop actions to better support underrepresented groups in cryptography while showcasing the exceptional career paths and research contributions of these communities.
decryptingdiversity.com/registration/
The event's focus is to develop actions to better support underrepresented groups in cryptography while showcasing the exceptional career paths and research contributions of these communities.
Reposted by Maria Corte-Real Santos
🥇The paper "PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies", co-authored by COSIC, has won the best paper award at @IACR_News #PKC 2025 in Røros, Norway. #pkc2025
Link: link.springer.com/chapter/10.1...
Link: link.springer.com/chapter/10.1...
May 12, 2025 at 9:14 AM
🥇The paper "PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies", co-authored by COSIC, has won the best paper award at @IACR_News #PKC 2025 in Røros, Norway. #pkc2025
Link: link.springer.com/chapter/10.1...
Link: link.springer.com/chapter/10.1...
Reposted by Maria Corte-Real Santos
The SQIparty starts on Monday, but it's still time to register!
We prepared an exciting program for you with a balanced mix of talks, coding sprints, skillshares and other activities!
www.cig.udl.cat/SQIparty2025...
See you in Lleida!
We prepared an exciting program for you with a balanced mix of talks, coding sprints, skillshares and other activities!
www.cig.udl.cat/SQIparty2025...
See you in Lleida!
Fancy some isogeny crypto?
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
April 25, 2025 at 2:14 PM
The SQIparty starts on Monday, but it's still time to register!
We prepared an exciting program for you with a balanced mix of talks, coding sprints, skillshares and other activities!
www.cig.udl.cat/SQIparty2025...
See you in Lleida!
We prepared an exciting program for you with a balanced mix of talks, coding sprints, skillshares and other activities!
www.cig.udl.cat/SQIparty2025...
See you in Lleida!
Reposted by Maria Corte-Real Santos
The mystery guest and myself have made it to Paris! Next stop, Barcelona!
April 25, 2025 at 10:17 PM
The mystery guest and myself have made it to Paris! Next stop, Barcelona!
Reposted by Maria Corte-Real Santos
As a surprise for everyone attending, we will even have a mystery guest joining us as well, who you don't want to miss! In fact, we have already started the train journey from Leuven!
Curious about the mystery guest? Well, what are you waiting for, sign up and find out next weekend!
Curious about the mystery guest? Well, what are you waiting for, sign up and find out next weekend!
April 24, 2025 at 5:04 PM
As a surprise for everyone attending, we will even have a mystery guest joining us as well, who you don't want to miss! In fact, we have already started the train journey from Leuven!
Curious about the mystery guest? Well, what are you waiting for, sign up and find out next weekend!
Curious about the mystery guest? Well, what are you waiting for, sign up and find out next weekend!
Season 6 of the Isogeny Club is officially done! You can catch up with all the talks here: isogeny.club
If, like us, you haven't had enough isogenies for the term, be sure to join us at the Brainstorm Sessions affiliated with Eurocrypt: isogeny.club/eurocrypt
If, like us, you haven't had enough isogenies for the term, be sure to join us at the Brainstorm Sessions affiliated with Eurocrypt: isogeny.club/eurocrypt
The Isogeny Club
isogeny.club
April 23, 2025 at 10:58 AM
Season 6 of the Isogeny Club is officially done! You can catch up with all the talks here: isogeny.club
If, like us, you haven't had enough isogenies for the term, be sure to join us at the Brainstorm Sessions affiliated with Eurocrypt: isogeny.club/eurocrypt
If, like us, you haven't had enough isogenies for the term, be sure to join us at the Brainstorm Sessions affiliated with Eurocrypt: isogeny.club/eurocrypt
Really excited to share the Decrypting Diversity Summit happening in Montpellier, France from 17-20 June! The goal of the summit is to promote diversity, inclusivity, and gender equality within the cryptography community. For more info: decryptingdiversity.com
Decrypting Diversity Summit
Decrypting Diversity Summit
decryptingdiversity.com
April 3, 2025 at 12:11 PM
Really excited to share the Decrypting Diversity Summit happening in Montpellier, France from 17-20 June! The goal of the summit is to promote diversity, inclusivity, and gender equality within the cryptography community. For more info: decryptingdiversity.com
Reposted by Maria Corte-Real Santos
Registration is now open! www.cig.udl.cat/SQIparty2025...
This workshop is gonna be great: cool people, interesting talks, and lots of great research on SQIsign and isogeny-based crypto. Mark it in your calendars!
And if you’re going to Eurocrypt, this is going to be convenient: the workshop is just the week before, and it’s not too far from Madrid
And if you’re going to Eurocrypt, this is going to be convenient: the workshop is just the week before, and it’s not too far from Madrid
Fancy some isogeny crypto?
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
March 24, 2025 at 9:14 AM
Registration is now open! www.cig.udl.cat/SQIparty2025...
Reposted by Maria Corte-Real Santos
Lleida is very well connected by train to Barcelona (1 hour) and to Madrid (2 hours).
Ideal to get acclimated to tapas before going to Eurocrypt and to the Isogeny brainstorm! isogeny.club/eurocrypt
bsky.app/profile/icas...
Ideal to get acclimated to tapas before going to Eurocrypt and to the Isogeny brainstorm! isogeny.club/eurocrypt
bsky.app/profile/icas...
March 13, 2025 at 5:38 PM
Lleida is very well connected by train to Barcelona (1 hour) and to Madrid (2 hours).
Ideal to get acclimated to tapas before going to Eurocrypt and to the Isogeny brainstorm! isogeny.club/eurocrypt
bsky.app/profile/icas...
Ideal to get acclimated to tapas before going to Eurocrypt and to the Isogeny brainstorm! isogeny.club/eurocrypt
bsky.app/profile/icas...
Reposted by Maria Corte-Real Santos
Fancy some isogeny crypto?
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
March 13, 2025 at 5:30 PM
Fancy some isogeny crypto?
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
Join us for a 3-day workshop on isogeny-based cryptography in Lleida, Catalonia, April 28-30
www.cig.udl.cat/icrypto2025_...
Brought to you by ULleida's Cryptography+Graphs group, the SQIsign team and friends!
Registration and program coming soon
Registration is free!
Next week (Tuesday 5pm CET) at The Isogeny Club we'll have Laurane Marco (EPFL) who will talk to us about computing modular polynomials modulo a generic prime! More details at isogeny.club
The Isogeny Club
isogeny.club
March 6, 2025 at 12:58 PM
Next week (Tuesday 5pm CET) at The Isogeny Club we'll have Laurane Marco (EPFL) who will talk to us about computing modular polynomials modulo a generic prime! More details at isogeny.club
The wait is finally over! Flowers are slowly blooming, birds are chiriping, and the Isogeny Club season 6 is about to start! Join us next Tuesday, February 25th at 17:00 CET, when Abel Laval will introduce us to a brand new analogue of the KLPT algorithm in dimension two! 🥳 isogeny.club
February 19, 2025 at 4:56 PM
The wait is finally over! Flowers are slowly blooming, birds are chiriping, and the Isogeny Club season 6 is about to start! Join us next Tuesday, February 25th at 17:00 CET, when Abel Laval will introduce us to a brand new analogue of the KLPT algorithm in dimension two! 🥳 isogeny.club
Reposted by Maria Corte-Real Santos
Absolutely thrilled for season six of the Isogeny Club (isogeny.club) starting February 25th by a talk by Abel Laval!
The Isogeny Club
isogeny.club
February 4, 2025 at 10:27 AM
Absolutely thrilled for season six of the Isogeny Club (isogeny.club) starting February 25th by a talk by Abel Laval!
Really excited to finally share PRISM, a new isogeny-based signature 🥳 joint work with lots of awesome people.
eprint.iacr.org/2025/135
eprint.iacr.org/2025/135
PRISM: Simple And Compact Identification and Signatures From Large Prime Degree Isogenies
The problem of computing an isogeny of large prime degree from a supersingular elliptic curve of unknown endomorphism ring is assumed to be hard both for classical as well as quantum computers.
In thi...
eprint.iacr.org
January 29, 2025 at 8:34 AM
Really excited to finally share PRISM, a new isogeny-based signature 🥳 joint work with lots of awesome people.
eprint.iacr.org/2025/135
eprint.iacr.org/2025/135
As a Christmas gift for everyone, we have one exciting final talk of this season! Join the #isogenyclub next Tuesday (17th Dec), where Sina Schaeffler will talk about constant-time lattice reduction for SQIsign. More info at isogeny.club
December 11, 2024 at 9:14 PM
As a Christmas gift for everyone, we have one exciting final talk of this season! Join the #isogenyclub next Tuesday (17th Dec), where Sina Schaeffler will talk about constant-time lattice reduction for SQIsign. More info at isogeny.club
Reposted by Maria Corte-Real Santos
Are you attending Asiacrypt2024? If you are a women-in-cryptography, you can participate in our coffee breaks: docs.google.com/forms/d/e/1F... We will match you with someone and you can grab a coffee/tea in person!
November 27, 2024 at 3:54 PM
Are you attending Asiacrypt2024? If you are a women-in-cryptography, you can participate in our coffee breaks: docs.google.com/forms/d/e/1F... We will match you with someone and you can grab a coffee/tea in person!